scsi: qla2xxx: Fix driver unload hang

commit dd322b7f3efc8cda085bb60eadc4aee6324eadd8 upstream.

This patch fixes driver unload hang by removing msleep()

Fixes: d7459527 ("scsi: qla2xxx: Add multiple queue pair functionality.")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20191105150657.8092-5-hmadhani@marvell.comReviewed-by: NEwan D. Milne <emilne@redhat.com>
Signed-off-by: NQuinn Tran <qutran@marvell.com>
Signed-off-by: NHimanshu Madhani <hmadhani@marvell.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/scsi/qla2xxx/qla_init.c

@@ -8725,8 +8725,6 @@ int qla2xxx_delete_qpair(struct scsi_qla_host *vha, struct qla_qpair *qpair)
 	struct qla_hw_data *ha = qpair->hw;
 
 	qpair->delete_in_progress = 1;
-	while (atomic_read(&qpair->ref_count))
-		msleep(500);
 
 	ret = qla25xx_delete_req_que(vha, qpair->req);
 	if (ret != QLA_SUCCESS)